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Investigating the UHECR characteristics from cosmogenic neutrino limits with the measurements of the Pierre Auger ObservatoryCamilla Petrucci,
Andrej Filipčič,
Jon Paul Lundquist,
Shima Ujjani Shivashankara,
Samo Stanič,
Serguei Vorobiov,
Danilo Zavrtanik,
Marko Zavrtanik, 2023, published scientific conference contribution
Abstract: Cosmogenic neutrinos are expected to originate in the extragalactic propagation of ultra-highenergy cosmic rays (UHECRs), as a result of their interactions with background photons. Due to these reactions, the visible Universe in UHECRs is more limited than in neutrinos, which instead could reach us without interacting after traveling cosmological distances. In this contribution, we exploit a multimessenger approach by computing the expected energy spectrum and mass composition of UHECRs at Earth corresponding to combinations of spectral parameters and mass composition at their sources, as well as parameters related to the UHECR source distribution, and by determining, at the same time, the associated cosmogenic neutrino fluxes. By comparing the expected UHECR observables to the energy spectrum and mass composition measured at the Pierre Auger Observatory above 10^17.8 eV and the expected neutrino fluxes to the most updated neutrino limits, we show the dependence of the neutrino fluxes on the characteristics of the the properties of the potential sources of UHECRs, such as their cosmological evolution and maximum
redshift. In addition, the fraction of protons compatible with the data is also investigated in terms of expected neutrino fluxes.
Keywords: Pierre Auger Observatory, ultra-high energy cosmic rays
Published in RUNG: 24.01.2024; Views: 429; Downloads: 4
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